|Written by Mike James|
|Wednesday, 24 August 2022|
The James Web telescope has already delivered enough stunning images to win popular approval and it is even making astrophysicists reconsider if the big bang ever actually happened, although the jury is not only still out on that one and is are likely to be out for some time. This is good science!
Rational Rose is a name I haven't heard in a long time. It was a UML-based code generator. You basically created a UML (Unified Modeling Language) graphical model, defined lots of properties and it generated the code. This is how it is being used for the James Webb:
"...using RRT, a set of standard task interface ports to which every task conforms that allows it to send command packets, receive telemetry packets, receive internal table values for task configuration, receive system time information, perform file operations, use centrally managed timers, and respond to check-in requests to verify that each task is still running."
The approach using RRT was very popular back in the 1990s and using separate tasks is the basis of ROS (Robot Operating System) and still popular in many other hardware systems. IBM may well have moved on from RRT, but clearly NASA doesn't have the luxury of simply abandoning software it has spent so much money on getting to the L2 point.
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|Last Updated ( Wednesday, 24 August 2022 )|